Funding for this research was provided by:
Biotechnology and Biological Sciences Research Council (BB/N002121/1)
Received: 19 October 2020
Accepted: 15 January 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: The project was carried out under UK Animal Scientific Procedure Act (ASPA) 1986; Home Office Project License PPL 708756 and University of Liverpool Ethics VREC417. Consent was obtained from all participating farms prior to the start of the study. All authors consent to the submission and publication of the manuscript.
: The authors declare that they have no competing interests.